Improvement in holdbacks for vehicles



E. W|LSON.

Hold-Back for Vehicles.

Fig- '0 Fig. 2.

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WITNESSES. INVENTOR.

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A M PHDID'L ITHGGIPAPH/L 60. IV. Z/OSBORNE PROLZSS,

PATENT OFFICE.

EDWARD WILSON, OF NORTHBBIDGE, MASSACHUSETTS.

IMPROVEMENT IN HOLDBACKS FOR VEHICLES.

Specification forming part of Letters Patent No. l34,236,'dated December24, 1872.

To all whom it may concern: Be it known that I, EDWARD WILSON, of

,Northbridge, in the county of Worcester and State of Massachusetts,have. invented a new andvaluable Improvement in Holdback-Irons; and I dohereby declare that the following is a full, clear, and exactdescription of the construction and operation of the same, referencebeing had to the annexed drawing making a part of this specification,and to the letters and figures of reference marked thereon.

Figure l of the drawing is a representation of a sectional view of my.invention. Fig. 2 1s a bottom view of the same. Fig. 3 is an enlargeddetail view.

This invent-ion has relation to holdbacks for carriages; and consists inthe novel construction and arrangement of parts whereby the attachmentof the holdback to the thill is made secure and rigid, as hereinaftermore fully specified.

Referring to the drawing, A designates the thill; B, the back-straphook; and 0, the post for preventing the accidental displacement of theback-strap, but so arranged as to allow the strap to be readily releasedwhen the horse is unhitched from the whiffletree. The post and hook-areconstructed of one piece of malleable metal, which is furnished with ascrew-shank, b, to enter the thill. Behind the hook the metal extendsashort distance, and is furnished with a stud, e, sharpened so as to becapable of being driven into the wood. Previously to the fastening ofsaid stud the extension from which it projects is bent up to allow theshank b to be fully inserted. Af-

terward the stud is driven into its place by the blow of a hammer onsaid extension. The latter is thus flattened down upon the thill. Thestud serves to prevent the holdback from turning or loosening, and forsuch purpose is the simplest and most efi'ecti've expedient that can bedevised. E designates a circular ridge or collar projecting from thebase of the holdback and encircling the shank. Upon the edge of thisridge burrs or teeth 9 are formed, so that when the last turn of theshank is being made the wood will be cutaway to pro duce a groove forthe ridge to enter, and so prevent the security or firmness of the shankin its place from being diminished. The ridge when embedded in the woodhas the effect of giving a good purchase to the shank, without which theholdback would be liable to become shaky and perhaps in time draw out ofits socket.

As will be observed, the stud c enters the wood obliquely, and isthereby less liable to be drawn out of place.

\Vhat I claim as new is- The improved holdback, constructed of malleablemetal, and furnished with the hook B, post 0, shank b with serratedcollar E, and stud e, substantially as specified.

In testimony that I claim the above I have hereunto subscribed my namein the presence ED WARD WILSON.

of two witnesses.

Witnesses ALBERT W. CURTIS, S. UTLEY.

